error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
  --> $DIR/impl-foreign-for-fundamental[foreign].rs:12:1
   |
LL | impl Remote for Box<i32> {
   | ^^^^^^^^^^^^^^^^--------
   | |               |
   | |               `i32` is not defined in the current crate
   | impl doesn't use only types from inside the current crate
   |
   = note: define and implement a trait or new type instead

error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
  --> $DIR/impl-foreign-for-fundamental[foreign].rs:16:1
   |
LL | impl<T> Remote for Box<Rc<T>> {
   | ^^^^^^^^^^^^^^^^^^^----------
   | |                  |
   | |                  `std::rc::Rc` is not defined in the current crate
   | impl doesn't use only types from inside the current crate
   |
   = note: define and implement a trait or new type instead

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0117`.